Machine for smoothing fiber-board.



A. W. CASE.

MACHINE FOR SMOOTHING FIBER BOARD.

APPLICATION FILED JULY 21,1909.

1,106,492. Patented Aug. 11, 1914.

Fig 2.

UNITED STATES PATENT OFFICE.

ALBERT WILLARD CASE, OF HIGHLAND Pm CONNECTICUT.

' I ACHINE FOB. SMOOTHING FIBEBABOARD.

Specification of ietterl Patent.

Application filed July 21, Ber in! 80. 508,729.

is to provide a machine of this class constrncted and arranged to quickly "perform the required operations in a thorough and eflicient manner.

One form of machine in the use of which the object sought may be attained is illustrated in the accompanying drawings, in which Figure '1 is a view in end elevation of a machine embodyin my invention. Fig. 2 is a view in front e evation of the same.-

In the manufacture of paper-board or the like from fibrous material reduced to pulp, and in which thesheets' are delivered from the making machine in a wet state, the subsequent handling of these sheets causes the surface to be roughened up, the material inthis wet state readily. yielding to any slight rubbing action caused in handling, or

otherwise, thus forming a roughened sur face on the sheet. Heretofore it has been a common practice, after the sheets have dried, to smooth off the surface with sandpaper manually operated. This method owmg to the time and labor required has proved to be expensive, and although manufacturers have realized the expense involved by this method of smoothing, no mechanical device so far as I am aware has ever been used for the purpose.

By the use of my improved machine, the

surface of the sheets of paper board or like material may be quickly and efficiently smoothed or finished and requiring the attcntion of a single operative. While the device is particularly efficient-for the purose described it is not limited to such use lint may be applied to other uses.

In the accompanying drawing, the numeral 6 indicates the ends of the frame of source of power as by means of a belt g passing over a pulley 9 secured to the driv mg shaft. A loose pulley 1O ma also be mounted on the driving shaft, i desir d, for the usual purpose.

Preferably at the upper end of the frame the reducing devices are mounted and these,

'in-the form'of device herein shown, are composed of cylindrical brushes 11,12 arranged with their surfaces in such relation that they will operate to remove any unevenness from a sheet which is passed between-them. In the preferred form of construction these brushes are rotated with their adjacent sur faces traveling in the same direction as that of a sheet;of'material passed between them and one of the rolls, as the upper is rotated at a. faster rate than the lower. These brushes may "be of any approved form and construction, preferably consisting of bristles of metal set into a core of wood or other suitable material. These rolls may be rotated in any suitable manner, in the form of construction herein shown, thelowerroll 12 rotated as b means of a belt 13 extending from a pn ey 14 on the driving shaft to a pulley 15 on the roll shaft, and thenpper roll 11 is driven as by means of a belt 16 passing from a pulley 17 on the driving shaft to a pulley 18 on the roll shaft.

The sheets are fed to the reducing brushes in any suitable manner, in the preferred form of construction that is shown herein feed rollers 19. and 20 being employed. These are mounted in the upper part of the frame of the machine preferably in front of the reducing brushes 11 and 12- and they are rotated 'at'a rate of speed slower than that at which the brushes travel. This causes the brushes to operate upon the surface to cut away and remove any unevenness which maybe thereon. These rolls may be mounted and operated in any desired manner, as herein shown the roll 20 being driven as by means of a gear 21 secured thereto and meshing with a direction gear 22 mounted on the frame of the machine, the latter meshing with a pinion 23 secured to the shaft of the smoothi brush 12. The upper roll 19 is preferab y frictionally driven y contact with the lower roll or with the sheet passing between 'the rolls, and the pressure of the rolls one against the other may be regulated as by means of a spring 24 governed by a screw shaft 25, in a manner common to devices of this class.

The above apparatus has been found by me to accomplish extremely satisfactory re- Patented Aug. 11, 1914.

sults, but I prefer to provide other sets of brushes and rolls and to that end have shown herein a second set of rolls mounted in advance of those described, this second set being preferably counterparts of that described and including the reducing brushes 30, 31, the latter driven by belt 32 from pulley 33 mounted on the driving shaft, and the. former being driven by belt 34 from pulley 35 secured to the driving shaft. The lower feed roll 36 is driven as by means of the gears 37, 38, the latter meshing with the -the sheets of paper a ainst therotary action of the brushes and tie rolls and tables lso keeping the sheets of paper from vertical movement under the action of the brushes.

While different forms of smoothing devices may be employed, I prefer, as shown herein, to use for such purpose brushes the bristles of which are composed of metal and which are spirally arranged, as shown in Fig. 2 of the drawings, but this arrangement, and in fact, others, may be departed from to a greater or lesser extent without avoiding the invention.

I elaim:--

1. In a machinefor smoothingthe roughened surface of paper board, rotating reducing brushes mounted in the machine frame with their axes parallel substantially to the plane of movement of board through the machine and having bristles formed and mounted to reduce the raised portions of the uneven surface of a sheet of material presented to said brushes, means for rotating the brushes, and means for feeding sheets between said brushes at a rate of surface speed slower than that at which the brushes travel.

2. In a machine for smoothing the roughened surface of paper board, reducing brushes rotatably mounted in the machineframe with their axes parallel substantially to the plane of movement of board through the machine and having bristles constituted to reduce the raised ortions of the uneven surface of a sheet 0 material presented to said brushes, means for rotating the brushes, feed rolls mounted appurtenant to the brushes to feed sheets between the latter, and means for rotating the feed rolls.

3. In a machine for smoothing the roughened surface of paper board, a plural number of sets of reducing brushes mounted in the machine frame, each set consisting of rotating brushes having their bristles constituted to reduce the raised portions of the uneven surface of a sheet of material presented to them, means for rotating the brushes, feed rolls to feed sheets to said brushes, and means for operating the feed rolls at a slower rate of surface speed than that of the brushes.

4. In a machine for smoothing the roughened surface of paper board, rotating brushes mounted in the frame of the machine and having bristles constituted to cut away and -reduce the raised portions of the uneven surface of a sheet of material presented to them, feed rolls, and means for operating the feed rolls to present a sheet to said brushes moving in the same direction as the meeting surface of the brushes and-at slower speed,

5. In a machine for smoothing the roughened surface of paper board, a pair of brushes mounted in the frame and having bristles constituted to reduce and'cut away the raised portions of a sheet of material presented to them, means for rotating the brushes each at a speed different from the other but in a direction to pass a sheet between them, a pair of feed rolls, and means for rotatingthe feed rolls to feed a sheet to the brushes.

6. In a machine for smoothing the roughened surface of paper board, a pair of brushes travelin with their surfaces in contact and with ristles constituted to cut away and reduce the raised portions of the j uneven surface of asheet of material passed through said brushes, a pair of feed rolls having their meeting surfaces arranged in line with the meeting surfaces of the brushes, and means for operating the feed rolls to present a sheet of material to said brushes.

7. In a machine for smoothing the roughened surface of paper board, feed rolls for causing movement of board through the machine, a pair of reducing brushes located one pair on each side of said feed rolls, each pair of brushes traveling with their surfaces in contact to cut-away and reduce the raised portion of the uneven surface of paper board moved by said feed rolls, the meeting surfaces of said brushes-being in the same plane as that of the meeting surface of the feed rolls, and means for operating the .feed rolls.

ALBERT WILLARD CASE.

Witnesses:

R. N. STANLEY, ALBERT L. CnowELL. 

